Energy Efficient Innovations

Product Overview  


For complete documentation, see the data sheet.

Printed On: 7/11/2015

NCV8881: Switcher with watchdog and reset

Product Description
The NCV8881 consists of a Buck switching regulator (SMPS) with a combination SMPS output undervoltage monitor and CPU watchdog circuit. In addition, two fixed-voltage low dropout regulator outputs are provided, and share an LDO output voltage status output. Once enabled, regulator operation continues until the Watchdog signal is no longer present. The NCV8881 is intended for Automotive, battery-connected applications that must withstand a 40 V load dump. The switching regulator is capable of converting the typical 9 V to 19 V automotive input voltage range to outputs from 3.3 V to 8 V at a constant switching frequency, which can be resistor programmed or synchronized to an external clock signal. Enable input threshold and hysteresis are programmable, with the enable input state replicated at an open drain Ignition Buffer output. The regulators are protected by current limiting, input overvoltage and overtemperature shutdown, as well as SMPS short circuit shutdown.
Features
 
  • 1.5 A Switching Regulator (internal power switch)
  • 100 mA, 5 V LDO Output
  • 40 mA, 8.5 V LDO Output
  • Operating Range 5 V to 19 V
  • Programmable SMPS Frequency
  • SMPS can be Synchronized to an External Clock
  • Programmable SMPS Output Voltage Down to 0.8 V
  • ±2% Reference Voltage Tolerance
  • Internal SMPS Soft-Start
  • Voltage-mode SMPS Control
Applications   End Products
  • Audio
  • Infotainment
  • Safety - Vision Systems
  • Instrumentation
 
  • Automotive Systems
Selected Electrical Specifications

Product Compliance Status Description Topology Control Mode VCC Min (V) VCC Max (V) VO Typ (V) IO Typ (A) Efficiency (%) fSW Typ (kHz) Package Type
 AEC Qualified 
 PPAP Capable 
 Pb-free 
 Halide free 
 Active     Switcher with watchdog and reset, Switcher with watchdog and reset   Step-Down   Voltage Mode   5   40   5, 8.5   1.5     275   SOIC-16W EP 
Package Availability
Type
PB free
Standard
SOIC-16W EP x